Radiation resistance of Ti—20Zr alloy in microcrystalline and nanocrystalline state

Abstract

In this work we studied structure of Ti—20Zr alloy in recrystallized and nanocrystalline conditions before and after irradiation by Zr³⁺ ions with energy 1.8 MeV to 80 dpa at 500° C. By transmission electron microscopy methods it was showed that irradiation of the alloy in the recrystallized state induced formation of c type dislocation loops, which are common characteristic of accelerated radiation-growth of the materials with hcp lattice. Irradiation of the nanostructured material leads to an isotropic increase in the grain size (from 49 nm to 146 nm); the signs of accelerated radiation-growth were not detected.